Hi
Sorry to hear about your niece.. These tickets went fast..I know when I called ticket master they told me that I had to start calling at least 10 min before or go online 10 min before.. Concert here in Ft. worth was sold out in 3 minutes.. I got lucky that I got my daughter and her friends tickets.. Ok but there is a website you can go to its ticketsnow.com or just google hannah montana concert tickets and you will find them.. The tickets on those websites are very pricey but it depends on what you think is pricey, check it out..
Good Luck!!!!